Hair trimming blade with Y-shaped teeth and tool bit assembly

Abstract

The invention relates to a hair trimming blade and tool bit assembly with Y-shaped teeth. The hair trimming blade and tool bit assembly is characterized by comprising at least one face plate making contact with the skin and side plates arranged on the two sides of the face plate; a plurality of blind grooves are formed in the panel, the opening end of each blind groove is communicated with the exterior of the panel, and the depth of each blind groove is larger than half of the width of the panel; by taking the blind groove as a reference, through grooves are formed in the two sides of the blind groove at intervals, and the two ends of each through groove communicate with the exteriors of the two sides of the panel correspondingly, so that a plurality of cutting teeth which are arranged side by side at intervals are formed in the length direction of the panel; from the front projection of the panel, the cutting tooth is provided with two branch teeth and a supporting tooth which are in a Y shape. The beneficial effects of the invention are that the plurality of blind grooves and the through grooves arranged at the two sides of the blind grooves are arranged, so that the surface utilization rate of the panel is improved, and the wool feeding benefit is improved; meanwhile, the surface area of the solid part of the panel is reduced, the friction resistance between the movable cutter and the panel is reduced, the surface temperature rise of the panel is reduced, and the use comfort of the blade is improved.

Description

Technical Field

[0001] The invention relates to a hair trimming device, and more particularly to a hair trimming blade with Y-shaped teeth and a cutter head assembly, which is mainly used in the field of personal care tools such as shavers and hair trimmers. Background Art

[0002] There are two main types of blades currently used in reciprocating hair trimming tools. One is a flexible thin sheet, such as the application filed by the present applicant on June 28, 2023, entitled: Integrated reciprocating blade head assembly and assembly process thereof, with application number: 2023107802318. This flexible blade will deform when it contacts the skin and is squeezed by the skin. The other is a hard thin sheet, such as the application filed by the present applicant on June 5, 2020, entitled: Cutting assembly of hair trimming device, with application number: 2020105067357. The thickness of the blade is greater than that of the flexible thin sheet and the blade will not deform when it contacts the skin and is squeezed by the skin.

[0003] In order to facilitate the introduction and trimming of hair when the blade formed by the hard sheet is used, a plurality of beard inlet grooves are arranged side by side and spaced apart and pass through the two sides of the blade, so that cutting teeth are formed between adjacent beard inlet grooves. When trimming hair, the hair pushed by the force will slide along the beard inlet groove and slide out of the beard inlet groove, which correspondingly reduces the trimming efficiency of hair. Secondly, the contact area between the cutting teeth on the existing blade and the moving knife is large, which correspondingly increases the friction resistance between the moving knife and the blade during the hair trimming process, causing the temperature rise of the blade surface to increase significantly, reducing the user's comfort and even scalding the user's skin. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a hair trimming blade and a cutter head assembly with Y-shaped teeth. The hair trimming blade can not only delay hair sliding to improve hair trimming efficiency, but also reduce the friction resistance between the moving blade and the blade, reduce the temperature rise of the blade surface, and improve user comfort.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is a hair trimming blade with Y-shaped teeth, comprising at least one panel in contact with the skin, and side panels arranged on both sides of the panel; a plurality of blind grooves are arranged on the panel, the opening end of each blind groove is connected to the outside of the panel, and the depth of the blind groove is greater than half of the width of the panel; based on the blind groove, through grooves are arranged at intervals on both sides of the blind groove, and the two ends of each through groove are respectively connected to the outside of the two sides of the panel, so that a plurality of cutting teeth arranged side by side and spaced apart are formed in the length direction of the panel; from the front projection of the panel, the cutting teeth have two divided teeth and supporting teeth in a Y shape.

[0006] Preferably, the plurality of blind grooves are symmetrically and staggeredly arranged along the center line of the panel width, and the opening ends of the blind grooves are respectively connected to the outside of both sides of the panel, so that a plurality of cutting teeth arranged side by side and staggered in a Y shape are formed on the panel.

[0007] Preferably, the through groove includes a non-linear first through groove and a second through groove, and the two ends of the first through groove and the second through groove are respectively connected to the outside of the two sides of the panel; the first through groove and the second through groove have the same width and are symmetrically arranged on both sides of the blind groove with the center line of the blind groove as the reference; or, the first through groove and the second through groove have different widths and are arranged on both sides of the blind groove with the center line of the blind groove as the reference.

[0008] Preferably, when projected from the front of the panel, the bottom of each blind groove is V-shaped or C-shaped, and the width of the bottom of the blind groove is gradually narrowed, so that the width of one end of the divided tooth connected to the supporting tooth is different from the width of the other end of the divided tooth.

[0009] Preferably, each blind groove and the first through groove and the second through groove are arranged side by side in a vertical or inclined manner relative to the two side edges of the panel.

[0010] Preferably, the first through groove and the second through groove both include straight segments at both ends connected to the outside of the panel, and a bending segment between the two straight segments; wherein the bending segment is a plurality of straight lines or arcs, and the width of the bending segment is different from or the same as the width of the straight segment.

[0011] Preferably, at least one anti-slip tooth for preventing hair from sliding is respectively provided on two opposite side walls of the bending section; or, at least one anti-slip tooth for preventing hair from sliding is provided in one of the side walls of the bending section.

[0012] Preferably, gathering holes are provided in at least part of the cutting teeth in the panel near the bottom of the blind groove, wherein at least part or all of the gathering holes are communicated with the blind groove.

[0013] Preferably, the spacing between the side panels disposed on both sides of the panel is the same as or different from the width of the panel.

[0014] On the basis of the above-mentioned hair trimming blade, the applicant also proposes a technical solution of a cutter head assembly, which includes the above-mentioned hair trimming blade with Y-shaped teeth.

[0015] The beneficial effect of the present invention is that the depth of the blind groove is set to be greater than half the width of the panel, so that when the hair enters the blind groove, it can be as close to the middle area of ​​the panel as possible, thereby improving the hair trimming efficiency; secondly, by adding through grooves on both sides of the blind groove in the panel, this not only improves the utilization rate of the panel, but also increases the surface hair feeding area and improves the hair feeding efficiency; at the same time, due to the reduction in the surface area of ​​the solid part of the panel, the contact area between the movable knife and the panel can also be significantly reduced during hair trimming, thereby reducing the friction resistance between the movable knife and the panel, reducing the surface temperature rise of the panel, and improving the comfort of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front view of a first embodiment of a hair trimming blade with Y-shaped teeth according to an embodiment of the present invention

[0017] Figure 2 for Figure 1 Enlarged view of P in the middle

[0018] Figure 3 A side view of a first embodiment of a hair trimming blade with Y-shaped teeth according to an embodiment of the present invention

[0019] Figure 4 A three-dimensional diagram of a first embodiment of a hair trimming blade with Y-shaped teeth according to an embodiment of the present invention

[0020] Figure 5 A front view of a second embodiment of a hair trimming blade with Y-shaped teeth according to an embodiment of the present invention

[0021] Figure 6 A front view of a third embodiment of a hair trimming blade with Y-shaped teeth according to an embodiment of the present invention

[0022] Figure 7 A front view of a fourth embodiment of a hair trimming blade with Y-shaped teeth according to an embodiment of the present invention

[0023] Figure 8 A front view of a fifth embodiment of a hair trimming blade with Y-shaped teeth according to an embodiment of the present invention DETAILED DESCRIPTION

[0024] The following is combined with Figures 1 to 8 The embodiments of the present invention are further described as follows:

[0025] The present invention provides a hair trimming blade with Y-shaped teeth, comprising at least one panel 1 in contact with the skin, and side panels 2 arranged on both sides of the panel 1, wherein the side panels 2 are used for installing the blade and a stationary blade holder; a plurality of blind grooves 3 are provided on the panel 1, for hair to enter the blade from the front of the panel 1, and the opening end of each blind groove 3 is connected to the outside of the panel 1, so that longer hair can enter the blind groove 3 through the side of the panel 1, thereby enabling the blade to trim both long and short hair.

[0026] like Figure 1 , 2 As shown in FIG4 , in actual production, the blind groove depth T1 is greater than half of the panel width T2. The blind groove depth T1 is an improvement made by collecting the user's usage habit data. Taking shaving as an example, during shaving, the user habitually uses the central area of ​​the panel 1 to contact the beard on the skin. Therefore, the middle area of ​​the panel 1 has the highest hair trimming efficiency. In view of this, the applicant deliberately sets the depth of the blind groove 3 to be greater than half of the panel width T2 in the present technical solution, so that when the hair enters the blind groove 3, it can be as close to the middle area of ​​the panel 1 as possible, thereby improving the hair trimming efficiency.

[0027] Secondly, as the blind groove depth T1 increases, when the hair enters the blind groove 3, the distance between the hair and the edge of the panel 1 also increases accordingly. During the process of the hair being pushed and sheared by the movable knife, the greater the distance from the edge of the panel 1, the greater the probability of the hair being cut, thereby preventing the hair from being pushed out of the blind groove 3 by the movable knife due to being at the edge of the panel 1, thereby improving the hair trimming efficiency.

[0028] In order to improve the surface utilization rate of the panel 1, improve the hair feeding efficiency and reduce the friction resistance between the panel 1 and the moving knife, based on the blind groove 3, through grooves 4 are provided at intervals on both sides of the blind groove 3, and the two ends of each through groove 4 are respectively connected to the outside of the two sides of the panel 1, so that a plurality of cutting teeth 5 arranged side by side and spaced are formed in the length direction of the panel 1; from the front projection of the panel 1, the cutting tooth 5 has two divided teeth 51 and a supporting tooth 52 in a Y shape. By adding through grooves 4 on both sides of the blind groove 3 in the panel 1, not only the utilization rate of the panel 1 is improved, the surface hair feeding area is increased, and the hair feeding efficiency is improved; at the same time, due to the reduction in the surface area of ​​the physical part of the panel 1, the contact area between the moving knife and the panel 1 can also be significantly reduced during hair trimming, thereby reducing the friction resistance between the moving knife and the panel 1, reducing the surface temperature rise of the panel 1, and improving the comfort of the blade.

[0029] Since the blind grooves 3 and the through grooves 4 are arranged in the panel 1, a plurality of cutting teeth 5 arranged at intervals and in a Y shape are formed in the panel 1, so that one end of the cutting teeth 5 is wider than the other end. If the cutting teeth 5 are arranged side by side and at intervals in a conventional manner, the surface utilization rate of the panel 1 is relatively low. In view of this, a plurality of blind grooves 3 are symmetrically and staggeredly arranged along the center line of the panel width T2, and the opening ends of each blind groove 3 are respectively connected to the outside of the two sides of the panel 1 in sequence, so that a plurality of cutting teeth 5 staggered side by side in a Y shape are formed on the panel 1. By arranging the Y-shaped cutting teeth 5 relatively and staggeredly, not only can the number of blind grooves 3 and through grooves 4 be increased, and the hair feeding efficiency be improved, but also the surface utilization rate of the panel 1 can be improved, and the contact area between the moving knife and the panel 1 can be reduced, so that the surface temperature rise of the panel 1 is reduced, and the comfort of the blade is improved. Secondly, the Y-shaped cutting teeth 5 are arranged relatively and staggered, so that the two sides of the panel 1 have openings of the blind grooves 3 respectively, so that the hair can enter the blind grooves 3 through the openings of the blind grooves 3 regardless of which side of the panel 1 it is on, thereby improving the convenience and efficiency of the blade in feeding the hair.

[0030] Of course, the Y-shaped cutting teeth 5 may not be arranged oppositely and staggered. For example, the Y-shaped cutting teeth 5 may be arranged side by side in the same direction so that the divided teeth 51 in each cutting tooth 5 are on the same side of the panel 1, and the supporting teeth 52 are on the other opposite side of the panel 1. Although this reduces the number of Y-shaped cutting teeth 5, a hair guide groove of other shapes may be provided on one side of the supporting teeth 52 in the panel 1 and between the two supporting teeth 52, which can also improve the surface utilization of the panel 1. However, since the symmetrical and staggered Y-shaped cutting teeth 5 make the surface utilization of the blade higher, and the overall shape is more neatly processed and beautiful, the symmetrical and staggered arrangement of the Y-shaped cutting teeth 5 is a preferred embodiment.

[0031] In order to delay the sliding of hair into the through groove 4 and improve the hair trimming effect, the through groove 4 includes a non-linear first through groove 41 and a second through groove 42, and the two ends of the first through groove 41 and the second through groove 42 are respectively connected to the outside of the two sides of the panel 1; the non-linear shape means that the two ends of the first through groove 41 and the second through groove 42 are not on the same straight line, and the two ends are misaligned. In this way, when the hair enters from either end of the first through groove 41 and the second through groove 42, the non-linear first through groove 41 and the second through groove 42 can block and delay the sliding of the hair, increase the time for the hair to slide out of the first through groove 41 and the second through groove 42, thereby buying time for the moving knife to cut along the reciprocating swing of the panel 1, ensuring that the hair entering from either end of the first through groove 41 and the second through groove 42 can be cut off, thereby improving the hair trimming effect. In the actual production process, the first through groove 41 and the second through groove 42 are symmetrically arranged on both sides of the blind groove 3 with the center line of the blind groove 3 as the reference, and are used to separate the cutting teeth 5 so that each cutting tooth 5 forms an independent Y shape; and the first through groove 41 and the second through groove 42 on both sides of the Y-shaped cutting tooth 5 can be set to the same or different widths.

[0032] In order to reduce the contact area between the movable blade and the panel 1, lower the surface temperature rise of the panel 1, and improve the shaving sound during hair trimming, the bottom of each blind groove 3 is V-shaped or C-shaped when projected from the front of the panel 1, and the width of the bottom of the blind groove 3 is gradually narrowed, so that the width of one end where the divided tooth 51 is connected to the supporting tooth 52 is different from the width of the other end of the divided tooth 51. By setting the bottom shape of the blind groove 3 to be V-shaped or C-shaped, not only the physical area of ​​the Y-shaped cutting tooth 5 is reduced, but also when the movable knife and the cutting tooth 5 cooperate to cut the hair, the contact area between the movable knife and the Y-shaped cutting tooth 5 is relatively reduced, thereby reducing the friction resistance between the movable knife and the Y-shaped cutting tooth 5, reducing the surface temperature rise of the panel 1, and improving the comfort of use of the trimming blade; at the same time, affected by the V-shaped or C-shaped bottom of the groove, the widths of the two ends of the divided teeth 51 in each Y-shaped cutting tooth 5 are different, that is, the width of one end of the divided tooth 51 connected to the supporting tooth 52 is smaller than the width of the other end of the divided tooth 51. Affected by the narrowing of the width of the divided tooth 51, after cooperating with the movable knife to cut the hair, the narrower end of the divided tooth 51 can form a certain amplitude to emit a crisp sound, thereby improving the user's sense of use.

[0033] In order to improve the cutting sharpness during the hair trimming process, each blind groove 3 and the first through groove 41 and the second through groove 42 are arranged side by side in a vertical or inclined manner relative to the two side edges of the panel 1. If they are vertical, the blade of the movable knife is parallel to the blade of the divided teeth 51 or the supporting teeth 52 in the cutting teeth 5, which will affect the cutting sharpness. At this time, the angle between the blade of the movable knife and the blade of the divided teeth 51 and the supporting teeth 52 in the cutting teeth 5 can be adjusted to improve the sharpness. If the blade angle of the movable knife cannot be adjusted, such as Figure 5As shown, the blind groove 3 and the first through groove 41 and the second through groove 42 can be inclined relative to the panel 1, so that the blades of the divided teeth 51 and the supporting teeth 52 in the Y-shaped cutting teeth 5 form a certain angle relative to the blade of the moving knife to improve the cutting sharpness. The specific setting can be determined according to the specific situation of the moving knife.

[0034] In order to avoid affecting the hair trimming performance of the movable knife due to the sliding of the hair, the first through groove 41 and the second through groove 42 both include a straight section 43 at both ends connected to the outside of the two sides of the panel 1, and a bending section 44 between the two straight sections 43; wherein the bending section 44 is a plurality of straight sections or arcs, and the width of the bending section 44 is different from or the same as the width of the straight section 43, preferably different widths. The first through groove 41 and the second through groove 42 are respectively configured to be composed of a straight section 43 and a bending section 44. When the hair enters through any straight end 43 on both sides of the panel 1, it is affected by the change of direction of the bending section 44, which can effectively block and delay the hair, buy time for the reciprocating swing cutting of the movable knife, and ensure that the hair entering the first through groove 41 and the second through groove 42 is cut at one time. In order to further enhance the hair blocking effect, the width T3 of the bent section 44 is smaller than the width T4 of the straight section 43. As the width T3 of the bent section 44 becomes narrower, the hair blocking and delaying effect can be achieved to the greatest extent.

[0035] like Figures 6 to 8 As shown, in order to further delay the hair from sliding out, at least one anti-slip tooth 6 for blocking the hair from sliding is respectively provided on the two opposite side walls of the bending section 44; by providing at least one anti-slip tooth 6 on one of the two side walls of the bending section 44, when the hair slides into the bending section 44, the anti-slip tooth 6 can obviously hinder the hair, increase the difficulty of the hair sliding forward or backward along the bending section 44, play a two-way delaying role, and ensure the hair trimming effect. Of course, in actual production, the anti-slip teeth 6 can also be provided on the two opposite side walls of the bending section 44, so that the hair blocking effect is better. However, due to the difficulty in processing the anti-slip teeth 6, for the purpose of easy production and processing, the anti-slip teeth 6 can be provided on only one of the two opposite side walls of the bending section 44. For the best blocking and delaying effect, without considering the production and processing factors, the anti-slip teeth 6 can be provided on the two side walls of the bending section 44, and the specific setting is not further limited in this embodiment.

[0036] like Figures 7-8As shown, in order to reduce the contact area between the moving knife and the blade and reduce the surface temperature rise of the blade during operation, a gathering hole 7 is provided in at least part of the cutting teeth 5 in the panel 1 near the bottom of the blind groove 3, wherein at least part or all of the gathering holes 7 are connected to the blind groove 3. By adding the gathering holes 7 at the bottom of the blind groove 3 and making part or all of the gathering holes 7 connected to the bottom of the blind groove 3, not only the entity part of the Y-shaped cutting teeth 5 is reduced, the friction resistance and surface temperature rise between the moving knife and the panel 1 are reduced; at the same time, the gathering holes 7 can also play a role in gathering hair and reduce the sliding of hair after entering the bottom of the blind groove 3.

[0037] like Figure 3 As shown, in actual production, the spacing T5 of the side panels 2 placed on both sides of the panel 1 can be the same or different from the width T6 of the panel 1. With the same width setting, the panel 1 and the side panels 2 in the blade are easier to form, and the production efficiency is higher. If different widths are used, such as the spacing between the two side panels 2 is smaller than the width of the panel 1, this will relatively increase the difficulty of processing the blade, but it will also bring some additional effects that are conducive to the introduction of hair; for example, the spacing between the two side panels 2 is smaller than the panel width T2, which is equivalent to the two side panels 2 shrinking toward the panel 1. When encountering long hair, it cannot enter the blind groove 3 or the through groove 4 from the front of the panel 1 due to its curling state. At this time, it can enter from the side of the panel 1, and the side panel 2 shrinks inward, which avoids the side panel 2 blocking the curled long hair, thereby facilitating the introduction of long hair into the blade, and correspondingly expanding the scope of application of the blade, so that it can be used not only for trimming long hair, but also for trimming short hair.

[0038] On the basis of the above-mentioned hair trimming blade, the applicant also proposes a technical solution of a cutter head assembly, which includes the above-mentioned hair trimming blade with Y-shaped teeth.

[0039] The above embodiments should not be regarded as limiting the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A hair trimming blade with Y-shaped teeth, comprising at least one panel (1) in contact with the skin, and side panels (2) disposed on both sides of the panel (1); characterized in that A plurality of blind grooves (3) are provided on the panel (1), the opening end of each blind groove (3) is connected to the outside of the panel (1), and the blind groove depth T1 is greater than half of the panel width T2; with the blind groove (3) as a reference, through grooves (4) are provided at intervals on both sides of the blind groove (3), and the two ends of each through groove (4) are respectively connected to the outside of both sides of the panel (1), so that a plurality of cutting teeth (5) arranged side by side and spaced apart are formed in the length direction of the panel (1); when viewed from the front projection of the panel (1), the cutting teeth (5) have two divided teeth (51) and a supporting tooth (52) in a Y shape.

2. The hair trimming blade with Y-shaped teeth according to claim 1, characterized in that A plurality of blind grooves (3) are symmetrically and staggeredly arranged along the center line of the width of the panel (1), and the open ends of the blind grooves (3) are respectively connected to the outside of two sides of the panel (1), so that a plurality of cutting teeth (5) arranged side by side and staggered in a Y shape are formed on the panel (1).

3. The hair trimming blade with Y-shaped teeth according to claim 1, characterized in that The through groove (4) comprises a first through groove (41) and a second through groove (42) which are non-linear, and the two ends of the first through groove (41) and the second through groove (42) are respectively connected to the outside of the two sides of the panel (1); the first through groove (41) and the second through groove (42) have the same width and are symmetrically arranged on the two sides of the blind groove (3) with the center line of the blind groove (3) as a reference; or the first through groove (41) and the second through groove (42) have different widths and are arranged on the two sides of the blind groove (3) with the center line of the blind groove (3) as a reference.

4. The hair trimming blade with Y-shaped teeth according to claim 1, characterized in that When projected from the front of the panel (1), the bottom of each blind groove (3) is V-shaped or C-shaped. The width of the bottom of the blind groove (3) is gradually narrowed, so that the width of one end where the divided tooth (51) is connected to the supporting tooth (52) is different from the width of the other end of the divided tooth (51).

5. The hair trimming blade with Y-shaped teeth according to claim 3, characterized in that Each blind groove (3) and the first through groove (41) and the second through groove (42) are arranged side by side in a vertical or inclined manner relative to the side edges of the panel (1).

6. The hair trimming blade with Y-shaped teeth according to claim 3, characterized in that The first through groove (41) and the second through groove (42) both comprise a straight section (43) at both ends connected to the outside of the two sides of the panel (1), and a bent section (44) between the two straight sections (43); wherein the bent section (44) is a plurality of straight sections or arcs, and the width of the bent section (44) is different from or the same as the width of the straight section (43).

7. The hair trimming blade with Y-shaped teeth according to claim 6, characterized in that At least one anti-slip tooth (6) for preventing hair from sliding is respectively provided on two opposite side walls of the bending section (44); or at least one anti-slip tooth (6) for preventing hair from sliding is provided in one of the side walls of the bending section (44).

8. The hair trimming blade with Y-shaped teeth according to claim 1, characterized in that A gathering hole (7) is provided in at least part of the cutting teeth (5) in the panel (1) near the bottom of the blind groove (3), wherein at least part or all of the gathering hole (7) is connected to the blind groove (3).

9. The hair trimming blade with Y-shaped teeth according to claim 1, characterized in that The spacing T5 between the side panels (2) disposed on both sides of the panel (1) is the same as or different from the width T6 of the panel (1).

10. The cutter head assembly is characterized in that A hair trimming blade having Y-shaped teeth according to any one of claims 1 to 9.

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